Leon Albert "Jake" "The Bullfrog" Swirbul (March 18, 1898 – June 28, 1960), was an aviation pioneer and co-founder of Grumman Aircraft Engineering Corporation. Swirbul was born in the Yorkville section of Manhattan. His parents Frederiks Zvirbulis and Lena (Dannenberga) Zvirbule were immigrants from Latvia. His family moved to Long Island when he was a child. He grew up in Sag Harbor and graduated from Pierson High School. He attended Cornell University until 1917 when he left school to enlist in the U.S. Marine Corps. The Swirbul Library at Adelphi University is named in his honor.